Combine Harvester

ABSTRACT

A combine harvester is provided with: a threshing device that performs a threshing process of threshing a crop; a grain tank that stores grain obtained by the threshing process; a grain discharging device that discharges grain to be stored in the grain tank to the outside of the vehicle body; a travel driving device that drives travel of the vehicle body; and an engine that serves as a power source. The combine harvester includes a first relay shaft to which power is transmitted from an output shaft of the engine, and the power of the engine is transmitted from the first relay shaft to the grain discharging device and the travel driving device in a branched manner.

TECHNICAL FIELD

The present invention relates to a combine harvester configured to, by power of a built-in engine, reap planted grain culm while traveling, and perform a threshing process of threshing the reaped grain culm with a threshing device, and also store grain obtained by the threshing process in a grain tank.

BACKGROUND ART

This type of combine harvester is provided with a travel driving device that drives a traveling device, and a grain discharging device that discharges grain to be stored in the grain tank to the outside. Conventionally, a configuration is adopted in which the engine is provided on a lateral side of the threshing device, and while power from the engine is transmitted from an output shaft of the engine to the travel driving device, power is transmitted from the output shaft of the engine to the grain discharging device through a dedicated transmission mechanism (for example, see Patent Document 1).

PRIOR ART DOCUMENTS Patent Documents

Patent Document 1: JP 2014-18104A

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention

Recently, in combine harvesters, there has been a demand to improve processing capacity, and it is necessary to further increase the size of the threshing device as the processing capacity is improved. Consequently, it has been thought to adopt a configuration in which the engine is arranged above or behind the threshing device such that the size of the threshing device can be increased while suppressing an increase in the lateral size of the vehicle body. In such a configuration, as in the conventional configuration described above, when adopting a transmission structure that transmits power from the output shaft of the engine in a manner distributed separately to the travel driving device and the grain discharging device respectively, the transmission structures may become complicated. For example, the transmission structures of those respective devices may have a long path.

Therefore, for example, it is desired to enable a configuration in which, even when the engine is arranged above or to the rear side of the threshing device, the power of the engine can be transmitted to the travel driving device and the grain discharging device with a simple transmission structure.

Means for Solving Problems

In a characteristic configuration of a combine harvester according to the present invention, the combine harvester includes:

a threshing device that performs a threshing process of threshing a crop, a grain tank that stores grain obtained by the threshing process, a grain discharging device that discharges grain to be stored in the grain tank to the outside of the vehicle body, a travel driving device that drives travel of the vehicle body, and an engine that serves as a power source,

wherein there is provided a first relay shaft to which power is transmitted from an output shaft of the engine, and

the power of the engine is transmitted from the first relay shaft to the grain discharging device and the travel driving device in a branched manner.

According to the present invention, power of the engine is transmitted to the first relay shaft, and then transmitted in a branched manner to the grain discharging device and the travel driving device. The first relay shaft is provided at a relay location between the engine and the grain discharging device and the travel driving device. Thus, the configuration of the transmission structure that transmits power from the first relay shaft in a branched manner to the grain discharging device and the travel driving device can be simplified in comparison to a configuration in which power from the output shaft of the engine is directly transmitted to the grain discharging device and the travel driving device in a branched manner.

In the present invention, it is suitable that:

the output shaft is provided at a location on one side of the engine in the vehicle body left-right direction,

power is transmitted from the output shaft to a plurality of driven devices provided in the threshing device,

the first relay shaft is provided in a state extending from a location on one side in the vehicle body left-right direction to a location on the other side, and is configured such that power from the output shaft is input to one side in the vehicle body left-right direction, and power is output from the other side in the vehicle body left-right direction to the grain discharging device and the travel driving device, and

a power transmission unit for a plurality of driven devices is provided on one side in the vehicle body left-right direction with respect to the engine, and a power transmission unit for the grain discharging device and the travel driving device are provided on the other side in the vehicle body left-right direction with respect to the engine.

According to this configuration, power of the engine is transmitted to a plurality of driven devices of the threshing device through a power transmission unit (hereinafter, referred to as a power transmission unit on one side) located on one side in the left-right direction of the vehicle body. Power of the engine is transmitted to the other side in the vehicle body left-right direction by the first relay shaft, and then is transmitted through the power transmission unit located on the other side in the left-right direction of the vehicle body (hereinafter referred to as a power transmission unit on the other side) to the grain discharging device and the travel driving device.

The power transmission unit on one side is a complicated transmission structure for driving the plurality of driven devices provided in the threshing device. By providing the power transmission unit on the other side, which is on the opposite side as the power transmission unit on one side having this sort of complicated configuration, it is possible to simplify the transmission structure for the grain discharging device and the travel driving device.

In the present invention, it is suitable that:

the grain tank and the engine are provided above the threshing device in a state lined up in the vehicle body front-rear direction, and

the first relay shaft is provided in an area surrounded by the upper face of the threshing device, the grain tank, and the engine.

According to this configuration, since the engine is provided above the threshing device, for example, even if the size of the threshing device is increased in order to increase the capacity of the threshing device, compared to a case where the engine is provided on the lateral side of the threshing device, there is little concern of increasing the lateral dimensions of the vehicle body. Moreover, since the engine is provided using an empty space above the threshing device and to the rear of the grain tank, even if the engine is provided above, there is little concern that the size of the vehicle body in the vertical direction will become large.

The grain tank is provided in a downward-funneled state so as to easily discharge stored grain. Therefore, an empty area is formed at a location surrounded by the upper face of the threshing device, the grain tank, and the engine. Therefore, using this empty space, the first relay shaft can be provided in a state where the first relay shaft is not obstructed by other devices.

In the present invention, it is suitable that:

in the grain discharging device, a transverse feed transport unit that is located in a lower portion inside the grain tank and feeds grain sideways, and a discharge conveyor that is located outside the grain tank and transports grain transported by the transverse feed transport unit to a discharge location, are provided,

power from the first relay shaft is transmitted to the transverse feed transport unit, and is transmitted to the discharge conveyor through the transverse feed transport unit,

a second relay shaft to which power from the first relay shaft is input is provided below the transverse feed transport unit,

the travel driving device is provided at a position below the grain tank in a lower portion of the vehicle body, and

a traveling transmission mechanism that transmits power from the second relay shaft to the travel driving device is provided in a state extending downward from the second relay shaft.

According to this configuration, the power is transmitted from the first relay shaft to the transverse feed transport unit, and the grain fed sideways and transported by the transverse feed transport unit is transported to an outward discharge location by the discharge conveyor to which power is transmitted in a state continuous from an end point of transport. The grain is smoothly transferred between the transverse feed transport unit and the discharge conveyor, and transported well.

Power from the first relay shaft is transmitted to the travel driving device through the second relay shaft and the traveling transmission mechanism. The travel driving device is provided at a low position near the traveling device, but receives power transmission through the second relay shaft located intermediately in the vertical direction. If power is transmitted directly from the first relay shaft to the travel driving device, maintenance work may be hindered, for example by passing through a location on the lateral side of the threshing unit where the threshing cylinder is provided. However, by transmitting power by passing through the second relay shaft, the location on the lateral side of the threshing unit is opened, and maintenance work is easily performed.

In the present invention, it is suitable that:

the engine is provided in a state located above the threshing device and to the rear side of the grain tank,

a threshing cylinder drive shaft for driving a threshing cylinder is provided on the rear side of the threshing device, and

a threshing drive transmission mechanism that transmits power of the engine from the output shaft downward to the rear to the threshing cylinder drive shaft is provided.

According to this configuration, power is transmitted from the output shaft of the engine to the threshing cylinder drive shaft through the threshing drive transmission mechanism, and the threshing cylinder is rotationally driven by the threshing cylinder drive shaft from the rear side of the threshing device. The threshing drive transmission mechanism transmits power from the output shaft downward to the rear to the threshing cylinder drive shaft on the rear side of the threshing device, so it is possible to avoid passing through the lateral side of the threshing unit, and there is little concern that maintenance work will be hindered.

In the present invention, it is suitable that:

the threshing device is provided with a sorting processing unit having another driven device other than the threshing cylinder,

a threshing input shaft for transmitting power from the threshing cylinder drive shaft to the sorting processing unit, and a threshing relay shaft to which power from the threshing input shaft is transmitted, are provided, and

a first threshing transmission mechanism for the threshing input shaft and a second threshing transmission mechanism for the threshing relay shaft are provided in a state bending in a substantially L-shape such that the first threshing transmission mechanism protrudes downward from the threshing cylinder drive shaft and the second threshing transmission mechanism protrudes downward from the threshing input shaft.

According to this configuration, the power from the threshing cylinder drive shaft is transmitted to the threshing input shaft through the first threshing transmission mechanism, and the power from the threshing input shaft is transmitted to the threshing relay shaft through the second threshing transmission mechanism. Power is transmitted from the threshing input shaft and the threshing relay shaft to any of a plurality of driven devices in the sorting processing unit.

Also, the first threshing transmission mechanism and the second threshing transmission mechanism are provided in a state bending in a substantially L-shape such that the first threshing transmission mechanism and the second threshing transmission mechanism protrude downward. That is, a location on the upper side in the area where the first threshing transmission mechanism and the second threshing transmission mechanism extend is in a state recessed downward and opened. As a result, the location on the lateral side of the threshing unit is opened, and maintenance work is easily performed.

In the present invention, it is suitable that:

the sorting processing unit is provided with, as the driven devices, a shake sorting device that shakes and sorts processed articles after threshing processing by the threshing cylinder has been performed on the articles, a primary product collection device that collects a primary product sorted by the shake sorting, a secondary product collection device that collects a secondary product sorted by the shake sorting, and a blowing device that supplies sorting air to the processed articles to be shaken and sorted, and

the sorting processing unit is also provided with a third threshing transmission mechanism that transmits power from the threshing relay shaft to the primary product collection device,

a fourth threshing transmission mechanism that transmits power from the primary product collection device to the secondary product collection device, and

a fifth threshing transmission mechanism that transmits power from the primary product collection device to the blowing device,

the third threshing transmission mechanism being provided in a state extending in an inclined posture from the threshing relay shaft downward toward the rear,

the fourth threshing transmission mechanism being provided in a state extending in a substantially horizontal posture from the primary product collection device toward the rear, and

the fifth threshing transmission mechanism being provided in a state extending in a substantially horizontal posture from the primary product collection device toward the front.

According to this configuration, the threshing relay shaft is provided at a position slightly higher than the sorting processing unit, and power from the threshing relay shaft is transmitted to the primary product collection device through the third threshing transmission mechanism in a posture inclined downward toward the rear. From the primary product collection device, power is transmitted to the secondary product collection device a position similarly low as the primary product collection device and the blowing device, through the fourth threshing transmission mechanism and the fifth threshing transmission mechanism in a substantially horizontal posture.

By providing the threshing relay shaft at a slightly higher position, while enabling power transmission to another device, for example, the reaping transport unit, it is possible to deliver good power transmission to the sorting processing unit.

In the present invention, it is suitable that:

the primary product collection device and the secondary product collection device are configured with a screw conveyor,

a primary product transport device that transports a primary product transported by the primary product collection device into the grain tank is provided on the opposite side of the primary product collection device from the side to which power is transmitted, and

a secondary product returning device that returns a secondary product transported by the secondary product collection device into the threshing device is provided on the opposite side of the secondary product collection device from the side to which power is transmitted,

the power of the primary product collection device being transmitted to the primary product transport device, and

the power of the secondary product collection device being transmitted to the secondary product returning device.

According to this configuration, power is transmitted to the primary product transport device from a location on the lower side in the transport direction of the primary product collection device, and a primary product (grain) transported sideways is smoothly transferred from the transport end point to the primary product transport device and transported upward. Power is transmitted to the secondary product returning device from a location on the lower side in the transport direction of the secondary product collection device, and the secondary product transported sideways is smoothly transferred to the primary product transport device and returned to the threshing device.

In the present invention, it is suitable that:

in the front portion of the vehicle body, there is provided a reaping transport unit that reaps planted grain culm and transports reaped grain culm to the threshing device, and

a reaping transmission mechanism that transmits power from the threshing relay shaft to a reaping transport input shaft of the reaping transport unit is provided,

the second threshing transmission mechanism being provided in a state extending in a substantially horizontal posture from the threshing input shaft toward the front, and

the reaping transmission mechanism being provided in a state extending in a substantially horizontal posture from the threshing relay shaft toward the front.

According to this configuration, power is transmitted from the threshing input shaft through the second threshing transmission mechanism in a substantially horizontal posture toward the threshing relay shaft, and power is transmitted from the threshing relay shaft through the reaping transmission mechanism in a substantially horizontal posture toward the reaping transport input shaft.

By providing the transmission mechanism in a horizontal posture such that a location on the lateral side of the threshing unit where the threshing cylinder is provided is opened, maintenance work can easily be performed, and moreover, the threshing relay shaft has a pulling force acting on both sides evenly, so no unreasonable cantilevered force is applied and there is little risk of damage.

In the present invention, it is suitable that:

a threshing power transmission system that transmits power from the threshing cylinder drive shaft to each part of the sorting processing unit is collectively provided on one side of the threshing device in the left-right direction, and

the reaping transport unit is provided with a reel that rakes planted grain culm rearward, a cutting blade that cuts a root of planted grain culm, an auger that gathers harvested grain culm in the lateral direction, and a feeder that transports the gathered grain culm toward the threshing device,

a reaping power transmission system that transmits power from the reaping transport input shaft to the reel, the cutting blade, and the auger being collectively provided on one side of the reaping transport unit in the left-right direction.

According to this configuration, by providing the threshing power transmission system and the reaping power transmission system collectively on one side in the left-right direction, maintenance work such as inspection and repair can be performed efficiently.

In the present invention, it is suitable that:

on the rear side of the threshing device, a threshing cylinder drive shaft for driving a threshing cylinder, and a shredding device that performs a shredding process of shredding threshed articles after the threshing process by the threshing device, are provided, and

a power transmission mechanism for the shredding process that transmits power from the threshing cylinder drive shaft downward to the rear to the shredding device is provided.

According to this configuration, the shredding device shreds waste straw finely. However, when a large amount of waste straw is thrown in, or the like, there is a concern that an operational abnormality due to straw clogging may occur. Therefore, a configuration is adopted in which power is transmitted from the threshing cylinder drive shaft to the shredding device separately from other devices (the sorting processing unit), and as a result it is possible to continue operation of the sorting processing device even if an operational abnormality occurs in the shredding device.

In the present invention, it is suitable that:

in the grain discharging device, a transverse feed transport unit that is located in a lower portion inside the grain tank and feeds grain sideways, and a discharge conveyor that is located outside the grain tank and transports grain transported by the transverse feed transport unit to a discharge location, are provided,

power from the engine is transmitted to one side of the first relay shaft in the left-right direction,

the discharge conveyor is provided in a state located on the other side of the grain tank in the left-right direction, and

power from the first relay shaft is transmitted to the discharge conveyor through the transverse feed transport unit.

According to this configuration, power is input to one side of the first relay shaft in the left-right direction, power is transmitted to the transverse feed transport unit from the other side of the first relay shaft in the left-right direction, and power from the transverse feed transport unit is transmitted to the discharge conveyor located on the other side in the left-right direction.

Accordingly, similar to the threshing power transmission system and the reaping power transmission system, the discharge conveyor is located on one side in the vehicle body left-right direction, so maintenance work such as inspection and repair can be performed efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall right side view of a combine harvester.

FIG. 2 is an overall left side view of the combine harvester.

FIG. 3 is a plan view of the combine harvester.

FIG. 4 is a plan view showing a vehicle body support structure.

FIG. 5 is a perspective view showing the vehicle body support structure.

FIG. 6 is a side view showing a support structure of a threshing device.

FIG. 7 is a plan view showing a support structure of the threshing device.

FIG. 8 is a vertical cross-sectional front view of the threshing device.

FIG. 9 is a vertical cross-sectional front view showing the support structure of the threshing device.

FIG. 10 is a perspective view showing a configuration of a sorting unit frame and a fuel tank frame.

FIG. 11 is an overall plan view of a state where a grain tank and a motor cover are removed.

FIG. 12 is a plan view of an engine support frame.

FIG. 13 is a front view of the engine support frame.

FIG. 14 is an overall rear view in a state where the motor cover is removed.

FIG. 15 is a left side view showing a transmission structure on the left side of the vehicle body.

FIG. 16 is a right side view showing a transmission structure on the right side of the vehicle body.

FIG. 17 is a plan view showing the transmission structure.

FIG. 18 is a plan view showing a transmission mechanism for blowing air.

FIG. 19 is a transmission system diagram.

FIG. 20 is a transmission system diagram.

BEST MODE FOR CARRYING OUT THE INVENTION

Below, with reference to the accompanying drawings, an example will be described in which an embodiment of a combine harvester according to the present invention is applied to an ordinary combine harvester.

Overall Configuration

As shown in FIGS. 1 to 3, the combine harvester is provided with a reaping transport unit 1 that reaps a crop and transports it rearward, a driving portion 3 covered with a cabin 2, a threshing device 4 that performs a threshing process of processing articles reaped by the reaping transport unit 1, a grain tank 5 that stores grain obtained by the threshing process by the threshing device 4, a motor 6 having an engine 21 as a power source, and left and right traveling units 7 positioned on both left and right sides of the vehicle body. Each of the left and right traveling units 7 includes a front wheel 8 as a front side traveling device that cannot be steered and is rotationally driven, and a rear wheel 9 as a rear side traveling device that can be steered.

In this embodiment, when defining the front-rear direction of the vehicle body, this direction is defined along the vehicle body traveling direction in a working state, and when defining the left-right direction of the vehicle body, left and right are defined as viewed from the vehicle body traveling direction. That is, the direction indicated by reference sign (F) in FIGS. 1, 2, and 3 is the front side of the vehicle body, the direction indicated by reference sign (B) in FIGS. 1, 2, and 3 is the rear side of the vehicle body, the direction indicated by reference sign (L) in FIG. 3 is the left side of the vehicle body, and the direction indicated by reference sign (R) in FIG. 3 is the right side of the vehicle body.

The reaping transport unit 1 is supported by a reaping elevating cylinder 10 as an elevating actuator at the front portion of the vehicle body so as to be able to be driven up and down around a laterally oriented fulcrum P1. The reaping transport unit 1 is provided with a reaping header 11 that reaps a crop to be planted and gathers the reaped crop in the center in a cutting width direction, and a feeder 12 that transports the reaped and centrally gathered crop to the threshing device 4 at the rear of the vehicle body.

As shown in FIGS. 1, 2, 3, and 20, the reaping header 11 has a rotating reel 13 that rakes the tip side of a crop to be reaped rearward, a clipper-type cutting blade 14 that cuts and reaps the root of the crop, and a lateral feed auger 15 that gathers the reaped crop toward the center in the cutting width direction, and the like.

In the feeder 12, as shown in FIG. 20, in a rectangular cylindrical transport case 16, a pair of left and right endless rotating chains 20 are wound and stretched across a drive sprocket 18 provided on a reaping input shaft 17 positioned in a rear upper portion and a driven rotating body 19 positioned in a front lower portion. A locking carrier (not shown) is provided at an appropriate interval in the circumferential direction across the left and right endless rotating chains 20, and the endless rotating chains 20 are driven to rotate, and thus, the crop delivered from the reaping header 11 is transported upward and rearward by the locking carrier.

The threshing device 4 is located at a low position in the center of the vehicle body in the left-right direction, and in a state in which, above the threshing device 4, the grain tank 5 is located on the front side of the vehicle body and the engine 21 serving as a power source is located on the rear side of the vehicle body, the grain tank 5 and the engine 21 are provided lined up in the front-rear direction.

Vehicle Body Support Structure

Following is a description of the vehicle body support structure.

As shown in FIGS. 4 and 5, a vehicle body frame 25 that supports the entire vehicle body is configured by a pair of left and right main frames 22 extending in the front-rear direction of the vehicle body, a front side connection portion 23 connecting the front portion of the left and right main frames 22, and a rear side connection portion 24 that connects the rear portion of the left and right main frames 22.

The left and right main frames 22 are formed of a channel material having a substantially C-shaped cross-section, and as shown in FIGS. 1 and 2, are provided long in the front-rear direction from the vehicle body front portion to the vehicle body rear portion. The left and right traveling units 7, that is, the left and right front wheels 8 and axles 8 a and 9 a of the left and right rear wheels 9, are provided at a position lower than the left and right main frames 22. As shown in FIGS. 4 and 5, the left and right front wheels 8 and the left and right rear wheels 9 are provided in a state positioned on the outer side of the vehicle body in the left-right direction of each of the left and right main frames 22, and the left and right main frames 22 are supported by the left and right front wheels 8 and the left and right rear wheels 9.

Following is a description of the front side connection portion 23.

As shown in FIGS. 4 and 5, the front side connection portion 23 includes left and right base portions 26 corresponding to a forward protruding portion that protrudes forward from the left and right main frames 22, an upper lateral frame 27 that connects the left and right base portions 26, and a lower lateral frame 28 that connects both left and right side portions below the left and right base portions 26. The base portions 26 are integrally connected to the front end portion of the left and right main frames 22 in a state protruding forward. The upper lateral frame 27 has a rectangular cylindrical shape, extends across the left and right base portions 26, and both left and right sides of the upper lateral frame 27 are integrally connected to the base portions 26.

As shown in FIGS. 7 and 9, axle cases 29 that rotatably support the axle of the front wheels 8 are bolted to the lower surface of the left and right base portions 26 projecting forward from the left and right main frames 22. Therefore, the front side of the main frames 22 is supported by the front wheels 8.

The left and right axle cases 29 are connected by the lower lateral frame 28.

The lower lateral frame 28 includes left and right front-rear oriented connecting bodies 30 extending in the front-rear direction, a rear side laterally oriented connecting body 31 that connects the rear portion of the left and right front-rear oriented connecting bodies 30, and a front side laterally oriented connecting body 32 that connects the front portion of the left and right front-rear oriented connecting bodies 30. The front side laterally oriented connecting body 32 is connected by bolting to the left and right axle cases 29.

A transmission case 34 including a travel driving device A for driving travel (see FIG. 19) is provided so as to enter between the upper lateral frame 27 and the lower lateral frame 28. As shown in FIG. 9, on the left and right sides of the transmission case, there are provided the axle cases 29 for the left and right front wheels 8, and left and right relay transmission cases 35 that connect the transmission case 34 to the left and right axle cases 29. Between the transmission case 34 and the relay transmission cases 35, and between the relay transmission cases 35 and the axle cases 29, respectively, flanges are connected by bolt fastening. Therefore, the axle cases 29 of the left and right front wheels 8, the left and right relay transmission cases 35, and the transmission case 34 are integrally connected.

The rear lower portions of the left and right axle cases 29 are connected by a laterally oriented pipe frame 36 made of a round pipe material. The internal space of the laterally oriented pipe frame 36 is used as a storage unit for hydraulic oil. Further, the front end portion of the transmission case 34 is connected to an intermediate portion in the left-right direction of the laterally oriented pipe frame 36 through a connecting member 37.

As is clear from the above description, a front side traveling unit connecting body that connects the left and right traveling units 7 (the front wheels 8) to each other is configured with the front side connection portion 23.

Following is a description of the rear side connection portion 24.

As shown in FIG. 5, the rear side connection portion 24 is provided with a rear connecting body 38 made of a round pipe material located below the left and right main frames 22 and extending across the left and right main frames 22. A rear wheel support body 39 serving as a traveling device support body provided across the left and right rear wheels is supported by the rear connecting body 38 so as to be swingable around a front-rear axis P2. In other words, a rear side traveling unit connecting body that connects the left and right traveling units 7 (the rear wheels 9) is configured with the rear wheel support body 39.

That is, support frames 40 protruding downward are provided at a position on the rear side of the vehicle body in the left and right main frames 22, and the rear connecting body 38 is connected bridged across the support frames 40 on both left and right sides. A rolling support portion 41 is provided in a fixed state in an intermediate portion in the left-right direction of the rear connecting body 38, and an intermediate portion in the vehicle width direction of the laterally oriented rear wheel support body 39 is supported by the rolling support portion 41 so as to be swingable around the axis P2 in the vehicle front-rear direction.

At both left and right end portions of the rear wheel support body 39, the left and right rear wheels 9 are supported so as to be swingable around the vertical axis, and a steering cylinder 42 is provided in the left-right direction on the rear side of the rear wheel support body 39. By operating the steering cylinder 42, the rear wheels 9 can be operated to swing around the vertical axis to perform a turning operation.

Threshing Device

Following is a description of the threshing device 4.

As shown in FIGS. 6, 7, 8, and 9, the threshing apparatus 4 includes a threshing unit 43 that performs a grain removal process, and a sorting unit 44 that performs a sorting process of sorting processed articles after the grain removal process has been performed by the threshing unit 43. The threshing unit 43 is provided with a substantially box-shaped threshing frame 45 in a state surrounding the outer peripheral portion, and inside the threshing frame 45, there is provided a threshing cylinder 46 that rotates around a rotation axis along the vehicle body front-rear direction. A process of removing grain from reaped grain culm is performed by the threshing cylinder 46.

The sorting unit 44 is provided with a sorting unit frame 47 composed of a rectangular peripheral wall portion. Inside the sorting unit frame 47, a sorting processing unit 48 is provided that, while shaking and transferring the processed articles after the grain removal process has been performed, sorts these articles into grain, secondary products such as branch-attached grain, waste straw and the like (see FIGS. 8 and 19).

Thus, the threshing unit 43 and the sorting unit 44 are each configured with the threshing frame 45 and the sorting unit frame 47 as frame structures whose outer peripheral portions covering the periphery have a large supporting strength. A shredding device 49 that shreds the threshed material (waste straw and the like) after threshing in the threshing device 4 is provided on the vehicle body rear side of the threshing device 4.

As shown in FIG. 19, the sorting processing unit 48 provided in the sorting unit 44 includes a screw conveyor type primary product collection device 51 that transports grain sorted by leaking downward while shaken and transported by the shake sorting device 50 to one lateral side, a screw conveyor type secondary product collection device 52 that transports secondary products to one lateral side, and a blowing device 53 that supplies a sorting air to the processed articles.

As shown in FIG. 16, on the right outside of the sorting unit 44, a grain transport conveyor 54 serving as a primary product transport device that transports the grain transported by the primary product collection device 51 into the grain tank 5 above, and a secondary product reduction device 55 for reducing the secondary products transported by the secondary product collection device 52 to the threshing unit 43, are provided.

Also, the threshing frame 45 used to configure the threshing unit 43 is mounted on and supported by the left and right main frames 22.

As shown in FIGS. 6, 9, and 14, the threshing frame 45 extends on both left and right sides of the threshing unit 43 across the entire area in the front-rear direction, and is provided with a substantially plate-like side wall portion 56 serving as left and right vertically oriented support portions extending in the vertical direction, a substantially plate-shaped rear wall portion 57 connecting the rear end portions of the left and right side wall portions 56, a substantially plate-shaped front wall portion 58 connecting the front end portions of the left and right side wall portions 56, a plurality of reinforcing support bodies surrounding the peripheral portion of the above wall portions, and the like, and these are connected together as a single body. The front wall portion 58 and the rear wall portion 57 are formed with openings through which articles pass after undergoing threshing processing.

The reinforcing support bodies are made of a rectangular cylindrical material, an angled material, or the like, and as a plurality of reinforcing support bodies, as shown in FIGS. 6 and 8, there are provided left and right lower portion support bodies 59 extending in the front-rear direction along the lower edges of the left and right side wall portions 56, left and right upper portion support bodies 60 extending in the front-rear direction along the upper edges of the left and right side wall portions 56, and left and right vertically oriented frame bodies 61 extending in the vertical direction along the left and right edges of the front wall portion 58, and the like.

The threshing frame 45 is mounted on and supported by the left and right main frames 22. More specifically, in a state where the left and right lower portion support bodies 59 of the threshing frame 45 are mounted on the upper face of the left and right main frames 22, the lower portion support bodies 59 and the main frames 22 are fixed by connecting with bolts at a plurality of locations.

As shown in FIG. 6, the left and right main frames 22 are provided in a lateral state in which the vehicle body is in a substantially parallel posture with respect to the ground contact surface when the vehicle body is in contact with the ground. On the other hand, these frames are provided in a state inclined upward to the rear, in which the upper portion of the threshing device 4 is positioned upward towards the rear side of the vehicle body. That is, the left and right upper support bodies 60 are provided in a state inclined upward to the rear along the upper portion of the threshing device 4.

The driving portion 3 is mounted on and supported by a driving portion frame 62 fixedly connected to the threshing frame 45. In the driving portion frame 62, a base end portion is connected and fixed to the upper sides of the left and right vertically oriented frame bodies 61, which are reinforcing support bodies at the front end of the threshing frame 45, and is provided in a state protruding in a cantilever manner toward the front of the vehicle body. Further, in the driving portion frame 62, an intermediate portion in the forward protruding direction is received and supported by rod-shaped left and right reinforcing members 63 that extend obliquely forward and upward from a position below the connection location of the base end portion in the left and right vertically oriented frame bodies 61. The driving portion frame 62 is provided in a horizontal state so as to be substantially parallel to the ground surface.

The driving portion 3 is surrounded by the cabin 2, and the entire driving portion 3 including the cabin 2 is configured with an integrated box-shaped body. This sort of driving portion 3 is mounted on and supported by the driving portion frame 62 through a vibration-proof rubber (not shown), and is fixed by a bolted connection.

As shown in FIG. 6, a bearing bracket 64 (see FIG. 6) that receives and supports the base end portion of the reaping transport unit 1 is received by and supported across the front face of the vertically oriented frame body 61 and the upper face of the base portion 26 as a forward protruding portion that protrudes forward with respect to the left and right vertically oriented frame bodies 61 from the left and right main frames 22. The base end portion is rotatably supported by the bearing bracket 64, and the entire reaping transport unit 1 is supported so as to be swingable around the lateral axis P1.

A top plate 65 covering the upper portion of the threshing cylinder 46 has a shape that is curved in a substantially semi-cylindrical shape along the outer peripheral surface of the threshing cylinder 46. A threshing upper connecting body 66 that connects the upper portions of the left and right side wall portions 56 is provided above the top plate 65. As shown in FIGS. 7 and 8, a plurality of the threshing upper connecting bodies 66 are provided in a state arranged at appropriate intervals in the front-rear direction of the vehicle body. The threshing upper connecting bodies 66 are formed in an arc shape so that the lower end edge thereof conforms to the shape of the top plate 65, and is appropriately bolted in a state where the lower end edge is applied to the top plate 65. In this way, the threshing upper connecting bodies 66 are supported by the top plate.

The sorting unit frame 47 used to configure the sorting unit 44 is suspended from and supported by the left and right main frames 22.

As shown in FIG. 10, the sorting unit frame 47 includes side wall portions 67 that cover both left and right sides of the sorting unit 44, and a front side support portion 68 that connects the front sides of the left and right side wall portion 67 to each other, and the sorting unit frame 47 is thus formed in a rectangular frame. The upper ends of the left and right side wall portions 67 are abutted against the lower surfaces of the left and right main frames 22, fixed by bolts, and thus suspended and supported.

The front end portion of the sorting unit frame 47 and the front side connection portion 23 of the vehicle body frame 25 are connected. Specifically, the rear side laterally oriented connecting body 31 in the lower lateral frame 28 used to configure the front side connection portion 23 of the vehicle body frame 25, and the front end portion of the left and right side wall portions 67 of the sorting unit frame 47, are connected to each other by bolting.

Fuel Tank

Following is a description of the support structure of the fuel tank 70.

As shown in FIGS. 2 and 7, the fuel tank 70 is provided between the left front wheel 8 and the rear wheel, and is positioned to the left lateral outside of the sorting unit 44. A fuel tank support frame 71 where the fuel tank 70 is mounted and supported is provided. As shown in FIG. 10, the fuel tank support frame 71 connects both left and right sides of the lower portion of the sorting unit frame 47 and protrudes outward on the left side of the vehicle body with respect to the main frame 22 on the left side among the left and right main frames 22.

The fuel tank support frame 71 includes two laterally oriented members 72 extending in the left-right direction while being separated in the front-rear direction, two front-rear oriented members 73 connecting the right end portions of the two laterally oriented members 72 and left and right intermediate portions, and a tank mounting portion 74 provided at a left end portion of the two laterally oriented members 72. The laterally oriented members 72 are configured with a square pipe material, and the front-rear oriented members 73 are configured with an angled material.

At the lower ends of the left and right side wall portions 67 of the sorting unit frame 47, recessed portions 75 into which the laterally oriented members 72 enter are formed at positions corresponding to the front and rear laterally oriented members 72. The fuel tank support frame 71 is mounted from the lower side of the sorting unit frame 47 so that the front and rear laterally oriented members 72 enter the recessed portions 75, and the two front and rear members 73 are fixed by bolting connection from below to the left and right side wall portions 67. The tank mounting portion 74 protrudes outward to the left side with respect to the left side wall portion 67 of the sorting portion frame 47, and the fuel tank 70 is mounted on and supported by the tank mounting portion 74.

Grain Tank

Following is a description of the grain tank 5.

As shown in FIGS. 1, 2, 15, and 16, the grain tank 5 is provided above the threshing device 4 so as to be located on the front side of the vehicle body. The grain tank 5 is supported on an upper portion of the threshing frame 45. That is, the grain tank 5 is mounted on and supported by left and right upper support bodies 60 of the threshing frame 45 through a front side tank support frame 76 on its vehicle body front side, and is mounted on and supported by the left and right upper support bodies 60 through a rear side tank support frame 77 on its vehicle body rear side.

The grain tank 5 is provided with a grain discharging device H that discharges grain to be stored to the outside of the vehicle body. In the grain discharge device H, a transverse feed transport unit 78 that is located in a lower portion inside the grain tank 5 and feeds grain sideways, and a discharge conveyor 79 that is located outside the grain tank 5 and transports grain transported by the transverse feed transport unit to a discharge location, are provided.

More specifically, as shown in FIGS. 11 and 15, the bottom face of the grain tank 5 is formed in a downward funnel shape as viewed in the left-right direction, and the screw type transverse feed transport unit 78 is provided at the lower end of the downward funnel portion inside the grain tank 5. Grain to be stored is guided to flow down toward the transverse feed transport unit 78 when discharged. As shown in FIG. 2, the screw conveyor type discharge conveyor 79 for discharging the grain transported by the transverse feed transport unit 78 toward a discharge location outside the vehicle body is provided outside the grain tank 5 on the left side.

The grain tank 5 is formed in a downward funnel shape when viewed in the front-rear direction of the vehicle body, and the discharge conveyor 79 is provided in a state where a base end portion 80 is supported by the downward funnel-shaped inclined surface portion of the grain tank 5. The base end portion 80 is supported so as to be capable of rotating around an axis perpendicular to the inclined surface. The discharge conveyer 79 is configured to be switchable, by rotating the base end portion with a hydraulic cylinder 81, between a protruding state in which a tip portion protrudes outward from the vehicle body and a stored state in which the tip portion is withdrawn toward the inside of the vehicle body. In the stored state, as shown in FIG. 2, the discharge conveyer 79 has a rearwardly inclined posture that is located higher toward the rear side of the vehicle body, and as shown in FIG. 14, is housed in a state entering a downward funnel-shaped recessed portion 82 of the grain tank 5. As shown in FIG. 14, similarly to the discharge conveyor 79, the fuel tank 70 is also housed in a state entering the downward funnel-shaped recessed portion 82 of the grain tank 5.

As shown in FIG. 15, the grain tank 5 has a bottom surface in a rearwardly inclined position on the front side supported by the front side tank support frame 76, and a bottom surface in a rearwardly inclined position on the rear side supported by the rear side tank support frame 77.

As shown in FIG. 11, the front side tank support frame 76 extends across the left and right side wall portions 56 of the threshing frame 45, and is mounted on and supported by the left and right upper support bodies 60 located at the upper edges of the left and right side wall portions 56, and connected by bolting.

The rear side tank support frame 77, similarly to the front side tank support frame 76, extends across the left and right side wall portions 56 of the threshing frame 45, and is mounted on and supported by the left and right upper support bodies 60 located at the upper edges of the left and right side wall portions 56.

As shown in FIG. 11, the rear side tank support frame 77 includes left and right tank lateral support portions 83 located on both left and right sides, and a plurality of left and right tank lateral support portions 84 connecting the left and right tank lateral support portions 83 to each other. The left and right tank lateral support portions 83 are each formed in a substantially trapezoidal frame shape in a side view.

Among the left and right tank lateral support portions 84, a lower connecting member 84 a that connects the lower portions of the left and right tank lateral support portions 83 is formed in a round pipe shape. Also, although the transmission structure will be described later, a rotating shaft (a counter shaft 138) for power transmission is inserted and supported so as to be rotatable around the left-right axis inside the lower connecting member 84 a. The left and right tank lateral support portions 83 are connected to each other by a plurality of connecting members 84 b in addition to the round pipe-shaped left and right tank connecting portions 84, thereby securing the support strength.

Motor

Following is a description of the motor 6.

As shown in FIG. 15, the motor 6 is supported by the threshing frame 45 in a state located to the rear side of the grain tank 5. As shown in FIGS. 1 and 2, substantially the entire outer peripheral portion of the motor 6 is covered with a motor cover 85. As shown in FIGS. 11 and 15, the inside of the motor cover 85 is provided with the engine 21 serving as a power source, an air cleaner 86 that purifies combustion air supplied to the engine 21, a pre-cleaner 87 that supplies air to the air cleaner 86 by removing dust from that air in advance, a radiator 88 that cools the engine 21, an exhaust treatment device 89 that purifies exhaust gas from the engine 21, and the like. A cooling fan 90 that generates cooling air is provided near the radiator 88. The exhaust treatment device 89 includes a diesel particulate filter (DPF) to reduce particulate matter (PM) such as diesel particulates contained in exhaust gas. Note that the motor cover 85 is configured to be easily opened for maintenance work.

An engine support frame 91 that supports the engine 21 is provided. The engine support frame 91 extends across the left and right side wall portions 56 of the threshing frame 45 and is mounted on and supported by the upper portion support bodies 60 located at the upper edges of the left and right side wall portions 56.

As shown in FIGS. 12 and 13, the engine support frame 91 includes side vertical surface portions 92 serving as left and right engine lateral support portions where the upper side of the left and right upper portion support bodies 60 extend in the front-rear direction, front portion connecting members 93 as front side engine left and right connecting portions that connect the front portions of the left and right side vertical surface portions 92 to each other, rear portion connecting members 94 as rear side engine left and right connecting portions that connect intermediate portions in the front-rear direction of the left and right side vertical surface portions 92 to each other, and a rear support portion 95 that connects a rear end side location of the left and right side vertical surface portions 92 to each other. A work table 96 which an operator can board for maintenance work of the motor 6 and the like is mounted on and supported by the rear support portion 95.

As shown in FIG. 15, the left and right side vertical surface portions 92 are formed so that the vehicle body front side is wide in the vertical direction and the width on the vehicle body rear side is substantially gradually reduced. The lower edges of the left and right side vertical surface portions 92 are bolted together while mounted on the left and right upper portion support bodies 60. In each of the front portion connecting members 93 and the rear portion connecting members 94, an engine mounting portion 97 for mounting and supporting the engine 21 is provided on both left and right sides. The engine 21 is mounted on and supported by the four engine mounting portions 97 through rubber mounts. The rubber mounts absorb the vibration of the engine 21 so that the vibration is not transmitted to the driving portion 3. A protection fence 98 that protects the worker is provided on the outer periphery of the work table 96.

The left and right upper portion support bodies 60 are provided in a state inclined upward to the rear, such that they are located on the upper side toward the rear side of the vehicle body, and are formed so that the left and right side vertical surface portions 92 are successively narrower toward the rear side of the vehicle body. Therefore, the upper edges of the left and right side vertical surface portions 92 are in a horizontal state, and the engine mounting portions 97 and the work table 96 are each provided in a horizontal state.

As shown in FIG. 14, the exhaust treatment device 89 and the radiator 88 are disposed on the left and right sides with respect to the engine 21 when viewed in the front-rear direction of the vehicle body, and the radiator 88 is provided so as to protrude outward on the right side with respect to the right side end portion (an example of one side in the left-right direction) of the threshing device 4.

The exhaust treatment device 89 is supported by the engine 21, and the radiator 88 is supported by the threshing device 4. As shown in FIG. 14, the exhaust treatment device 89 is mounted on and supported by a bearing member 99 fixed to a casing of the engine 21. The exhaust treatment device 89 and the engine 21 are provided in a state where the upper end positions are substantially at the same height and are arranged side by side in the left-right direction. The radiator 88 is received and supported by a bracket 100 fixed to the right side wall portion 56 of the threshing frame 45. Although not shown, the cooling fan 90 is driven by a hydraulic motor. Also, although not shown, the motor 6 is provided with a support frame formed in a frame shape for supporting the motor cover 85. The lower end of the support frame is supported by the engine support frame 91. The upper portion of the radiator 88 is supported by the support frame to maintain its posture.

As shown in FIGS. 11 and 15, the air cleaner 86 and the pre-cleaner 87 are provided in a state located on the vehicle body rear side of the engine 21. The air cleaner 86 and the pre-cleaner 87 are supported by the engine support frame 91. The air cleaner 86 is supported by a support portion 101 that is located below and is formed erected from the engine support frame 91.

The work table 96 is provided in a state where the air cleaner 86 and the pre-cleaner 87 are located on the rear side of the vehicle body, so that maintenance work can be easily performed. A ladder 102 (see FIGS. 1 and 2) allowing an operator to board or leave the work table 96 from outside the vehicle body is provided at the rear of the work table 96.

Transmission Structure 1

Following is a description of a power transmission structure for transmitting the power of the engine 21 to the threshing device 4 and the reaping transport unit 1.

As shown in FIG. 11, the engine 21 is provided in a state with an output shaft 21A oriented in the left-right direction and protruding leftward. As shown in FIG. 19, there are provided a first transmission mechanism D1 (corresponding to a threshing drive transmission mechanism) that transmits the power of the engine 21 from the output shaft 21A to a threshing cylinder drive shaft 105 for driving the threshing cylinder, and a second transmission mechanism D2 that transmits power from the threshing cylinder drive shaft 105 to other driven devices provided in the sorting unit 44, that is, the shake sorting device 50, the primary product collection device 51, the secondary product collection device 52, and the blowing device 53. The first transmission mechanism D1 and the second transmission mechanism D2 are arranged so as to be located on the left side of the vehicle body with respect to the engine 21.

As shown in FIGS. 11 and 15, a threshing cylinder gearshift device 106 that shifts the power transmitted to the threshing cylinder drive shaft 105 and transmits the power to the threshing cylinder is provided at a position above the shredding device 49 on the vehicle body rear side of the threshing device 4. The periphery of the threshing cylinder gearshift device 106 is covered with a case, and inside the case, as shown in FIG. 19, the power transmitted from the left-right oriented threshing cylinder drive shaft 105 is shifted up and down in two stages, and transmitted to a front-rear oriented threshing cylinder shaft 107.

As shown in FIGS. 15 and 19, the first transmission mechanism D1 is a belt-type transmission mechanism that transmits power from the output shaft 21A of the engine 21 to the threshing cylinder drive shaft 105. In the first transmission mechanism D1, a transmission belt 110 is wound around an output pulley 108 provided on the output shaft 21A and an input pulley 109 provided on the threshing cylinder drive shaft 105. The first transmission mechanism D1 is located on the left side of the threshing device 4, and is provided in a state inclined downward to the rear so as to be positioned lower toward the rear side of the vehicle body, and transmits power downward to the rear.

As shown in FIGS. 15 and 19, the second transmission mechanism D2 includes a threshing input shaft 111 to which power from the threshing cylinder drive shaft 105 is input, and a threshing relay shaft 112 to which power from the threshing input shaft 111 is transmitted. Power is transmitted from the threshing input shaft 111 to the shake sorting device 50, and is transmitted from the threshing relay shaft 112 to the primary product collection device 51, the secondary product collection device 52, and the blowing device 53.

That is, the second transmission mechanism D2 includes a belt-type first threshing transmission mechanism 113 that transmits power from the threshing cylinder drive shaft 105 to the threshing input shaft 111, a belt-type second threshing transmission mechanism 114 that transmits power from the threshing input shaft 111 to the threshing relay shaft 112, a belt-type third threshing transmission mechanism 115 that transmits power from the threshing relay shaft 112 to the primary product collection device 51, a belt-type fourth threshing transmission mechanism 116 that transmits power from the primary product collection device 51 to the secondary product collection device 52, a belt-type fifth threshing power transmission device 117 that transmits power from the primary product collection device 51 to the blowing device 53, and a chain transmission mechanism 118 that transmits power from the threshing input shaft 111 to the shake sorting device 50 (specifically, a shake driving unit).

As shown in FIG. 15, the threshing cylinder drive shaft 105 is provided at a high position behind the threshing unit 43, and the threshing input shaft 111 is located closer to the front of the vehicle body than the threshing cylinder drive shaft 105 and below the threshing unit 43. As a result, the first threshing transmission mechanism 113 is provided in a state inclined forward. On the other hand, the second threshing transmission mechanism 114 is provided so as to extend in a substantially horizontal posture toward the front from the threshing input shaft 111. Therefore, the first threshing transmission mechanism 113 and the second threshing transmission mechanism 114 are provided in a state bending in a substantially L-shape that protrudes downward. By disposing the transmission mechanisms in this manner, the outside of the left side wall portion 56 of the threshing unit 43 is largely opened, and maintenance work of the threshing unit 43 can be easily performed.

The fifth threshing transmission mechanism 117 is provided with a blower speed change mechanism 119 including a split pulley type belted continuously variable transmission. Although not described in detail, as shown in FIG. 18, the blower speed change mechanism 119 can change the belt winding diameter by changing the interval between split pulleys 121 by an internal cam mechanism 120. The operation of the cam mechanism 120 is performed by manual operation or operation by an actuator. The power transmitted to the primary product collection device 51 is transmitted to the grain transport conveyor 54. Further, the power transmitted to the secondary product collection device 52 is transmitted to the secondary product reduction device 55.

As shown in FIGS. 17 and 19, on the threshing input shaft 111, in order from laterally outside the vehicle body, supported so as to be capable of rotating as a single body, there are lined up a power input pulley 122 serving as a power input rotating body to which power from the threshing cylinder drive shaft 105 is input, a relay pulley 123 serving as a relay output rotating body that outputs power to the threshing relay shaft 112, and an output sprocket 118A serving as a sorting output rotating body in the chain transmission mechanism 118 that outputs power to the shake sorting device 50.

As shown in FIGS. 11 and 19, on the threshing relay shaft 112, in order from laterally outside the vehicle body, supported so as to be capable of rotating as a single body, there are lined up a relay input pulley 124 serving as a relay input rotating body to which power from the threshing input shaft 111 is transmitted, a reaping transport output pulley 125 serving as a reaping transport output rotating body that outputs power to the reaping transport unit 1, and a sorting output pulley 126 serving as a sorting output rotating body that outputs power to the primary product collection device 51.

A belt-type reaping transmission mechanism 127 is provided as a third power transmission mechanism D3 that transmits the power transmitted to the sorting processing unit 48 to the reaping transport unit 1. The reaping transmission mechanism 127 is configured to transmit the power from the threshing relay shaft 112 to the reaping input shaft 17 of the reaping transport unit 1. The reaping input shaft 17 functions as a drive shaft of the feeder 12 and is provided in a state protruding outward to the left side from the transport case 16 of the feeder 12. As shown in FIG. 15, the reaping transmission mechanism 127 is provided in a state extending in a substantially horizontal posture from the threshing relay shaft 112 toward the front.

As shown in FIG. 17, the reaping transport input pulley 128 serving as a reaping transport input rotating body to which power from the threshing relay shaft 112 is transmitted is supported so as to be capable of rotating as a single body with an outward protruding portion that protrudes outward to the left side from the transport case 16 of the reaping input shaft 17. Also, among the outward protruding portions of the reaping input shaft 17, at locations positioned between the reaping transport input pulley 128 and the feeder 12 (the transport case 16), a reaping output sprocket 129 serving as a reaping output rotating body that outputs power to the rotating reel 13, the cutting blade 14, and the transverse feed auger 15 is supported so as to be capable of rotating as a single body.

As shown in FIGS. 2, 17, and 20, power from the reaping output sprocket 129 is supplied to a reaping relay shaft 131 provided at a rear portion of the reaping header 11 by a transmission chain 130 extending in the front-rear direction along the left outside of the transport case 16. The power from the reaping relay shaft 131 is transmitted to the rotating reel 13 through a reel chain transmission mechanism 132 and a belt transmission mechanism 133, and transmitted to the transverse feed auger 15 through an auger chain transmission mechanism 134, and transmitted to the cutting blade 14 through a belt transmission mechanism 135.

As shown in FIGS. 15 and 19, a belt-type shredding transmission mechanism 136 that transmits power from the threshing cylinder drive shaft 105 to the shredding device 49 is provided. A shredding transmission mechanism 139 is provided so as to extend downward from the threshing cylinder drive shaft 105. Therefore, the second transmission mechanism D2 is configured to branch and transmit the power transmitted to the threshing cylinder drive shaft 105 to the sorting processing unit 48 and the shredding device 49.

As is clear from the above description, a threshing power transmission system that transmits the power from the threshing cylinder drive shaft 105 to a plurality of driven devices provided in the sorting processing unit 48 is collectively provided on the left side of the threshing device 4. Also, a reaping power transmission system, which transmits power from the reaping input shaft 17 to the rotating reel 13, the cutting blade 14, and the transverse feed auger 15, is collectively provided on the left side of the reaping transport unit 1. Therefore, the power transmission unit that transmits the power from the output shaft 21A of the engine 21 to the plurality of driven devices provided in the sorting processing unit 48 is disposed on the left side of the vehicle body with respect to the engine 21 (an example of one side in the left-right direction).

Transmission Structure 2

Following is a description of a power transmission structure for transmitting the power of the engine 21 to the grain discharging device H and the travel driving device A.

As shown in FIGS. 15 and 19, a fourth transmission mechanism D4 that transmits the power from the engine 21 to the grain discharging device H and the travel driving device A is provided, and in the output shaft 21A of the engine 21, the power of the engine 21 is branched to the first transmission mechanism D1 and the fourth transmission mechanism D4. In the fourth transmission mechanism D4, the counter shaft 138 is provided as a first relay shaft to which power is transmitted from the output shaft 21A of the engine 21 through a transmission belt 137, and the power of the engine 21 is supplied from the right end portion of the counter shaft 138 to the grain discharging device H and the travel driving device A in a branched manner. Therefore, the power transmission unit that transmits the power from the output shaft 21A of the engine 21 to the grain discharging device H and the travel driving device A is provided on the vehicle body right side of the engine 21.

The counter shaft 138, which is a rotating shaft for transmission, extends from a lateral portion of the threshing apparatus 4 to the other side portion in a state where the counter shaft 138 is inserted through the inside of the round pipe-shaped lower connecting member 84 a in the rear side tank support frame 77, and is supported so as to be capable of rotating around a lateral axis. That is, the counter shaft 138 is provided so as to extend from the left side of the vehicle body as one side in the left-right direction of the vehicle body to the right side of the vehicle body. Power from the output shaft 21A is input to the left side of the vehicle body, power is output from the right side of the vehicle body to the grain discharging device H and the travel driving device A. As shown in FIG. 15, the counter shaft 138 is provided in an area surrounded by the upper face of the threshing device 4, the grain tank 5, and the engine 21 in a side view.

The fourth transmission mechanism D4 includes a belt-type discharge transmission mechanism 139 that transmits the power from the counter shaft 138 to the transverse feed transport unit 78 of the grain discharging device H, a belt-type traveling first transmission mechanism 141 that transmits power from the counter shaft 138 to a traveling relay shaft 140 serving as a second relay shaft provided on the lateral side of the front portion of the threshing unit 43, and a belt-type traveling second transmission mechanism 142 that transmits power from the traveling relay shaft 140 to the travel driving device A.

As shown in FIG. 16, the discharge transmission mechanism 139 is provided in a state extending in a substantially horizontal posture toward the front. The power transmitted from the discharge transmission mechanism 139 is transmitted to the discharge conveyor 79 located on the left side of the vehicle body through the transverse feed transport unit 78.

The traveling first transmission mechanism 141 is provided in a state extending in an inclined posture from the counter shaft 138 downward toward the front. The travel driving device A is provided at a position below the grain tank 5 in the lower portion of the vehicle body, and the traveling second transmission mechanism 142 is provided in a state extending downward in a substantially vertical posture from the traveling relay shaft 140.

Although a detailed description of the configuration of the travel driving device A is omitted, the left and right front wheels 8 are driven based on driving operation of a gearshift operation tool, a turning operation tool, and the like (not shown) provided in the driving portion 3, and transmit power so as to drive at an appropriate speed. When traveling straight, the left and right front wheels 8 are driven at a constant speed or substantially at a constant speed, and when turning, they are driven with a difference in speed.

As described above, the output shaft 21A of the engine 21 is provided on the left side of the vehicle body, and the power transmission unit that transmits power from the output shaft 21A to each device of the threshing device 4 and the reaping transport unit 1 is provided on the left side of the vehicle body. The counter shaft 138 is configured to output power to the grain discharging device H and the travel driving device A from the right side of the vehicle body. That is, a power transmission unit that transmits power from the output shaft 21A to the grain discharging device H and the travel driving device A is provided on the right side of the vehicle body. The power transmitted from the right side of the vehicle body from the counter shaft 138 is transmitted to the discharge conveyor 79 located on the left side of the vehicle body through the transverse feed transport unit 78.

OTHER EMBODIMENTS

(1) In the above embodiment, a configuration is adopted in which as the first relay shaft, the counter shaft 138 that extends from one side to the other side in the vehicle body left-right direction is provided, but instead, a configuration may be adopted in which the first relay shaft is provided on only one side in the vehicle body left-right direction, in a short cantilevered manner.

(2) In the above embodiment, a configuration is adopted in which the grain tank 5 and the engine 21 are provided above the threshing device 4 in a state lined up in the vehicle body front-rear direction, and the first relay shaft (the counter shaft 138) is provided in an area surrounded by the upper face of the threshing device 4, the grain tank 5, and the engine 21, but instead, a configuration may be adopted in which, for example, the first relay shaft is provided below the engine 21, or is provided on the rear side of the engine 21.

(3) In the above embodiment, a configuration is adopted in which power of the engine 21 is transmitted to the threshing cylinder drive shaft 105 and further transmitted to the threshing input shaft 111, but instead, a configuration may be adopted in which power of the engine 21 is directly transmitted to the threshing input shaft 111.

(3) In the above embodiment, a configuration is adopted in which the power transmission unit for the plurality of driven devices of the threshing device 4 is provided on the vehicle body left side with respect to the engine 21, and the power transmission unit for the grain discharging device H and the travel driving device A is provided on the vehicle body right side with respect to the engine 21, but instead, a configuration may be adopted in which the power transmission unit for the plurality of driven devices is provided on the vehicle body right side with respect to the engine 21, and the power transmission unit for the grain discharging device H and the travel driving device A is provided on the vehicle body left side with respect to the engine 21.

(4) In the above embodiment, a configuration is adopted in which the traveling relay shaft 140 (the second relay shaft) to which power from the counter shaft 138 (the first relay shaft) is input is provided below the transverse feed transport unit 78, and the traveling transmission mechanism 142 that transmits power from the traveling relay shaft 140 to the travel driving device A is provided. However, instead, a configuration may be adopted in which power from the counter shaft 138 (the first relay shaft) is directly transmitted to the travel driving device A.

(5) In the above embodiment, a configuration is adopted in which the threshing device 4 includes the threshing unit 43 and the sorting unit 44, the threshing frame 45 included in the threshing unit 43 is mounted on and supported by the left and right main frames 22, and the sorting unit frame 47 included in the sorting unit 44 is suspended from and supported by the left and right main frames, but instead, a configuration may be adopted in which the threshing device 4 is integrally housed in a case in which a threshing unit and a sorting unit are formed in a substantially box shape, and the entire threshing device is mounted on and supported by the vehicle body frame.

(6) In the above embodiment, a configuration is adopted in which, above the threshing device 4, in a state where the grain tank 5 is located on the front side of the vehicle body and the engine 21 is located on the rear side of the vehicle body, the grain tank 5 and the engine 21 are provided in a direction lined up in the front-rear direction, but instead, a configuration may be adopted in which a grain tank and an engine are provided in a state side-by-side with a threshing device.

(7) In the above embodiment, a configuration is adopted in which the shredding device 49 is provided, but a configuration may also be adopted in which a shredding device is not provided.

(8) In the above embodiment, a configuration is adopted in which the traveling units 7 are provided with the front wheels 8 as a front side traveling device and the rear wheels 9 as a rear side traveling device. However, instead, a configuration may be adopted in which one among the front side traveling device and the rear side traveling device is configured with a crawler traveling device, and the other is configured with wheels. Alternatively, a configuration may be adopted in which the front side traveling device and the rear side traveling device respectively are configured with a crawler traveling device. Also, a configuration may be adopted in which the left and right traveling units respectively are configured with a single crawler traveling device.

INDUSTRIAL APPLICABILITY

The present invention is applicable not only to an ordinary combine harvester, but also to a self-removing combine harvester which performs threshing of a tip side while performing sandwiched transport of the root of reaped grain culm using a feed chain.

DESCRIPTION OF REFERENCE SIGNS

-   -   1: reaping transport unit     -   4: threshing device     -   5: grain tank     -   13: reel     -   14: cutting blade     -   15: auger     -   17: reaping transport input shaft     -   21: engine     -   21A: output shaft     -   46: threshing cylinder     -   48: sorting processing unit     -   49: shredding device     -   50: shake sorting device     -   51: primary product collection device     -   52: secondary product collection device     -   53: blowing device     -   54: primary product transport device     -   55: secondary product reduction device     -   78: transverse feed transport unit     -   79: discharge conveyor     -   105: threshing cylinder drive shaft     -   111: threshing input shaft     -   112: threshing relay shaft     -   113: first threshing transmission mechanism     -   114: second threshing transmission mechanism     -   115: third threshing transmission mechanism     -   116: fourth threshing transmission mechanism     -   117: fifth threshing transmission mechanism     -   127: reaping transmission mechanism     -   136: shredding transmission mechanism     -   138: first relay shaft     -   140: second relay shaft     -   142: traveling transmission mechanism     -   A: travel driving device     -   D1: threshing drive transmission mechanism     -   H: grain discharging device 

1. A combine harvester, comprising: a threshing device that performs a threshing process of threshing a crop, a grain tank that stores grain obtained by the threshing process, a grain discharging device that discharges grain to be stored in the grain tank to the outside of the vehicle body, a travel driving device that drives travel of the vehicle body, and an engine that serves as a power source, wherein there is provided a first relay shaft to which power is transmitted from an output shaft of the engine, and the power of the engine is transmitted from the first relay shaft to the grain discharging device and the travel driving device in a branched manner.
 2. The combine harvester according to claim 1, wherein the output shaft is provided at a location on one side of the engine in the vehicle body left-right direction, power is transmitted from the output shaft to a plurality of driven devices provided in the threshing device, the first relay shaft is provided in a state extending from a location on one side in the vehicle body left-right direction to a location on the other side, and is configured such that power from the output shaft is input to one side in the vehicle body left-right direction, and power is output from the other side in the vehicle body left-right direction to the grain discharging device and the travel driving device, and a power transmission unit for a plurality of driven devices is provided on one side in the vehicle body left-right direction with respect to the engine, and a power transmission unit for the grain discharging device and the travel driving device are provided on the other side in the vehicle body left-right direction with respect to the engine.
 3. The combine harvester according to claim 1, wherein the grain tank and the engine are provided above the threshing device in a state lined up in the vehicle body front-rear direction, and the first relay shaft is provided in an area surrounded by the upper face of the threshing device, the grain tank, and the engine.
 4. The combine harvester according to claim 1, wherein in the grain discharging device, a transverse feed transport unit that is located in a lower portion inside the grain tank and feeds grain sideways, and a discharge conveyor that is located outside the grain tank and transports grain transported by the transverse feed transport unit to a discharge location, are provided, power from the first relay shaft is transmitted to the transverse feed transport unit, and is transmitted to the discharge conveyor through the transverse feed transport unit, a second relay shaft to which power from the first relay shaft is input is provided below the transverse feed transport unit, the travel driving device is provided at a position below the grain tank in a lower portion of the vehicle body, and a traveling transmission mechanism that transmits power from the second relay shaft to the travel driving device is provided in a state extending downward from the second relay shaft.
 5. The combine harvester according to claim 1, wherein the engine is provided in a state located above the threshing device and to the rear side of the grain tank, a threshing cylinder drive shaft for driving a threshing cylinder is provided on the rear side of the threshing device, and a threshing drive transmission mechanism that transmits power of the engine from the output shaft downward to the rear to the threshing cylinder drive shaft is provided.
 6. The combine harvester according to claim 5, wherein the threshing device is provided with a sorting processing unit having another driven device other than the threshing cylinder, a threshing input shaft for transmitting power from the threshing cylinder drive shaft to the sorting processing unit, and a threshing relay shaft to which power from the threshing input shaft is transmitted, are provided, and a first threshing transmission mechanism for the threshing input shaft and a second threshing transmission mechanism for the threshing relay shaft are provided in a state bending in a substantially L-shape such that the first threshing transmission mechanism protrudes downward from the threshing cylinder drive shaft and the second threshing transmission mechanism protrudes downward from the threshing input shaft.
 7. The combine harvester according to claim 6, wherein the sorting processing unit is provided with, as the driven devices, a shake sorting device that shakes and sorts processed articles after threshing processing by the threshing cylinder has been performed on the articles, a primary product collection device that collects a primary product sorted by the shake sorting, a secondary product collection device that collects a secondary product sorted by the shake sorting, and a blowing device that supplies sorting air to the processed articles to be shaken and sorted, and the sorting processing unit is also provided with a third threshing transmission mechanism that transmits power from the threshing relay shaft to the primary product collection device, a fourth threshing transmission mechanism that transmits power from the primary product collection device to the secondary product collection device, and a fifth threshing transmission mechanism that transmits power from the primary product collection device to the blowing device, the third threshing transmission mechanism being provided in a state extending in an inclined posture from the threshing relay shaft downward toward the rear, the fourth threshing transmission mechanism being provided in a state extending in a substantially horizontal posture from the primary product collection device toward the rear, and the fifth threshing transmission mechanism being provided in a state extending in a substantially horizontal posture from the primary product collection device toward the front.
 8. The combine harvester according to claim 7, wherein the primary product collection device and the secondary product collection device are configured with a screw conveyor, a primary product transport device that transports a primary product transported by the primary product collection device into the grain tank is provided on the opposite side of the primary product collection device from the side to which power is transmitted, and a secondary product returning device that returns a secondary product transported by the secondary product collection device into the threshing device is provided on the opposite side of the secondary product collection device from the side to which power is transmitted, the power of the primary product collection device being transmitted to the primary product transport device, and the power of the secondary product collection device being transmitted to the secondary product returning device.
 9. The combine harvester according to claim 6, wherein in the front portion of the vehicle body, there is provided a reaping transport unit that reaps planted grain culm and transports reaped grain culm to the threshing device, and a reaping transmission mechanism that transmits power from the threshing relay shaft to a reaping transport input shaft of the reaping transport unit is provided, the second threshing transmission mechanism being provided in a state extending in a substantially horizontal posture from the threshing input shaft toward the front, and the reaping transmission mechanism being provided in a state extending in a substantially horizontal posture from the threshing relay shaft toward the front.
 10. The combine harvester according to claim 9, wherein a threshing power transmission system that transmits power from the threshing cylinder drive shaft to each part of the sorting processing unit is collectively provided on one side of the threshing device in the left-right direction, and the reaping transport unit is provided with a reel that rakes planted grain culm rearward, a cutting blade that cuts a root of planted grain culm, an auger that gathers harvested grain culm in the lateral direction, and a feeder that transports the gathered grain culm toward the threshing device, a reaping power transmission system that transmits power from the reaping transport input shaft to the reel, the cutting blade, and the auger being collectively provided on one side of the reaping transport unit in the left-right direction.
 11. The combine harvester according to claim 1, wherein on the rear side of the threshing device, a threshing cylinder drive shaft for driving a threshing cylinder, and a shredding device that performs a shredding process of shredding threshed articles after the threshing process by the threshing device, are provided, and a power transmission mechanism for the shredding process that transmits power from the threshing cylinder drive shaft downward to the rear to the shredding device is provided.
 12. The combine harvester according to claim 1, wherein in the grain discharging device, a transverse feed transport unit that is located in a lower portion inside the grain tank and feeds grain sideways, and a discharge conveyor that is located outside the grain tank and transports grain transported by the transverse feed transport unit to a discharge location, are provided, power from the engine is transmitted to one side of the first relay shaft in the left-right direction, the discharge conveyor is provided in a state located on the other side of the grain tank in the left-right direction, and power from the first relay shaft is transmitted to the discharge conveyor through the transverse feed transport unit. 